Astrid Gjelstad

发表

Micro-electromembrane extraction using multiple free liquid membranes and acceptor solutions - Towards selective extractions of analytes based on their acid-base strength.

S. Pedersen‐Bjergaard, P. Kubáň, K. F. Seip, 2016, Analytica chimica acta.

Water-Soluble Dried Blood Spot in Protein Analysis: A Proof-of-Concept Study.

T. G. Halvorsen, Astrid Gjelstad, Cecilie Rosting, 2015, Analytical chemistry.

Hollow Fiber Liquid-Phase Microextraction

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2012 .

Evaluation of water-soluble DBS for small proteins: a conceptual study using insulin as a model analyte.

T. G. Halvorsen, Astrid Gjelstad, Cecilie Rosting, 2016, Bioanalysis.

Mass transfer in electromembrane extraction--The link between theory and experiments.

S. Pedersen‐Bjergaard, Chuixiu Huang, K. F. Seip, 2016, Journal of separation science.

Combination of Electromembrane Extraction and Liquid-Phase Microextraction in a Single Step: Simultaneous Group Separation of Acidic and Basic Drugs.

Xiantao Shen, S. Pedersen‐Bjergaard, Chuixiu Huang, 2015, Analytical chemistry.

Parallel artificial liquid membrane extraction: micro-scale liquid-liquid-liquid extraction in the 96-well format.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2013, Bioanalysis.

Kinetic aspects of hollow fiber liquid-phase microextraction and electromembrane extraction.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2012, Analytica chimica acta.

Storage of oral fluid as dried spots on alginate and chitosan foam - a new concept for oral fluid collection.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2013, Bioanalysis.

Electromembrane extraction of stimulating drugs from undiluted whole blood.

Lars Erik Eng Eibak, A. Christophersen, R. G. Jamt, 2012, Journal of chromatography. A.

Electromembrane extraction and HPLC analysis of haloacetic acids and aromatic acetic acids in wastewater.

K. Alhooshani, C. Basheer, J. Kaur, 2011, Talanta.

Ion-pair mediated transport of angiotensin, neurotensin, and their metabolites in liquid phase microextraction under acidic conditions.

J. E. Reubsaet, Håvard Loftheim, Astrid Gjelstad, 2005, Journal of separation science.

Dried blood spots and parallel artificial liquid membrane extraction-A simple combination of microsampling and microextraction.

S. Pedersen‐Bjergaard, E. Øiestad, Astrid Gjelstad, 2018, Analytica chimica acta.

Efficient discrimination and removal of phospholipids during electromembrane extraction from human plasma samples.

S. Pedersen‐Bjergaard, Chuixiu Huang, E. Øiestad, 2017, Bioanalysis.

Parallel artificial liquid membrane extraction as an efficient tool for removal of phospholipids from human plasma.

T. G. Halvorsen, S. Pedersen‐Bjergaard, E. Øiestad, 2016, Journal of pharmaceutical and biomedical analysis.

Electromembrane extraction of substances with weakly basic properties: a fundamental study with benzodiazepines.

S. Pedersen‐Bjergaard, E. Øiestad, Astrid Gjelstad, 2018, Bioanalysis.

Electromembrane extraction–Recent trends and where to go

S. Pedersen‐Bjergaard, Chuixiu Huang, Astrid Gjelstad, 2017, Journal of pharmaceutical analysis.

Electromembrane extraction with alkylated phosphites and phosphates as supported liquid membranes

S. Pedersen‐Bjergaard, Chuixiu Huang, Astrid Gjelstad, 2017 .

Electromembrane extraction of polar basic drugs from plasma with pure bis(2-ethylhexyl) phosphite as supported liquid membrane.

S. Pedersen‐Bjergaard, Chuixiu Huang, K. F. Seip, 2016, Analytica chimica acta.

Organic solvents in electromembrane extraction: recent insights

S. Pedersen‐Bjergaard, Chuixiu Huang, Astrid Gjelstad, 2016 .

Parallel artificial liquid membrane extraction of acidic drugs from human plasma

S. Pedersen‐Bjergaard, M. Roldán-Pijuán, Astrid Gjelstad, 2015, Analytical and Bioanalytical Chemistry.

Electromembrane extraction: a new technique for accelerating bioanalytical sample preparation.

S. Pedersen‐Bjergaard, Astrid Gjelstad, 2011, Bioanalysis.

Kinetic electro membrane extraction under stagnant conditions--fast isolation of drugs from untreated human plasma.

Lars Erik Eng Eibak, S. Pedersen‐Bjergaard, K. Rasmussen, 2010, Journal of chromatography. A.

Electrokinetic migration of acidic drugs across a supported liquid membrane.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2007, Journal of chromatography. A.

Electromembrane extraction of basic drugs from untreated human plasma and whole blood under physiological pH conditions

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2009, Analytical and bioanalytical chemistry.

Investigation of alternative supported liquid membranes in electromembrane extraction of basic drugs from human plasma

Xiantao Shen, S. Pedersen‐Bjergaard, Chuixiu Huang, 2018 .

Salt effects in electromembrane extraction.

S. Pedersen‐Bjergaard, K. F. Seip, Astrid Gjelstad, 2014, Journal of chromatography. A.

Complexation-mediated electromembrane extraction of highly polar basic drugs—a fundamental study with catecholamines in urine as model system

L. Vidal, A. Canals, S. Pedersen‐Bjergaard, 2017, Analytical and Bioanalytical Chemistry.

Alginate and chitosan foam combined with electromembrane extraction for dried blood spot analysis.

Lars Erik Eng Eibak, S. Pedersen‐Bjergaard, K. Rasmussen, 2012, Analytical chemistry.

Green and sustainable drug analysis – Combining microsampling and microextraction of drugs of abuse

S. Pedersen‐Bjergaard, E. Øiestad, Astrid Gjelstad, 2021, Sustainable Chemistry and Pharmacy.

Immunocapture and Nano Liquid Chromatography

T. G. Halvorsen, Astrid Gjelstad, Cecilie Rosting, 2019 .

Determination of the low-abundant protein biomarker hCG from dried matrix spots using immunocapture and nano liquid chromatography mass spectrometry.

T. G. Halvorsen, Astrid Gjelstad, Cecilie Rosting, 2018, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Liquid-phase microextraction in 96-well plates - calibration and accurate quantification of pharmaceuticals in human plasma samples.

S. Pedersen‐Bjergaard, E. Øiestad, Astrid Gjelstad, 2019, Journal of chromatography. A.

Electromembrane extraction with solvent modification of the acceptor solution: improved mass transfer of drugs of abuse from human plasma.

S. Pedersen‐Bjergaard, E. Øiestad, Astrid Gjelstad, 2019, Bioanalysis.

Parallel artificial liquid membrane extraction of new psychoactive substances in plasma and whole blood.

S. Pedersen‐Bjergaard, E. Øiestad, Astrid Gjelstad, 2017, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Parallel electromembrane extraction in a multiwell plate

Lars Erik Eng Eibak, S. Pedersen‐Bjergaard, K. Rasmussen, 2013, Analytical and Bioanalytical Chemistry.

The potential of electromembrane extraction for bioanalytical applications.

S. Pedersen‐Bjergaard, K. F. Seip, Astrid Gjelstad, 2015, Bioanalysis.

Recent developments in electromembrane extraction

S. Pedersen‐Bjergaard, Astrid Gjelstad, 2013 .

Electromembrane extraction from biological fluids.

N. Petersen, S. Pedersen‐Bjergaard, K. Rasmussen, 2011, Analytical sciences : the international journal of the Japan Society for Analytical Chemistry.

Microextraction across supported liquid membranes forced by pH gradients and electrical fields.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2007, Journal of chromatography. A.

Exhaustive and stable electromembrane extraction of acidic drugs from human plasma.

S. Pedersen‐Bjergaard, Chuixiu Huang, K. F. Seip, 2015, Journal of chromatography. A.

Exhaustive extraction of peptides by electromembrane extraction.

S. Pedersen‐Bjergaard, Chuixiu Huang, Astrid Gjelstad, 2015, Analytica chimica acta.

Development of a flat membrane based device for electromembrane extraction: a new approach for exhaustive extraction of basic drugs from human plasma.

Lars Erik Eng Eibak, Xiantao Shen, S. Pedersen‐Bjergaard, 2014, Journal of chromatography. A.

Parameters affecting electro membrane extraction of basic drugs.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2008, Journal of separation science.

Simulation of flux during electro-membrane extraction based on the Nernst-Planck equation.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2007, Journal of chromatography. A.

Electrokinetic migration across artificial liquid membranes Tuning the membrane chemistry to different types of drug substances.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2006, Journal of chromatography. A.

Exhaustive electromembrane extraction of some basic drugs from human plasma followed by liquid chromatography-mass spectrometry.

Lars Erik Eng Eibak, S. Pedersen‐Bjergaard, K. Rasmussen, 2012, Journal of pharmaceutical and biomedical analysis.

Electromembrane extraction of peptides--fundamental studies on the supported liquid membrane.

S. Pedersen‐Bjergaard, K. F. Seip, Astrid Gjelstad, 2011, Journal of separation science.

Comprehensive study of buffer systems and local pH effects in electromembrane extraction.

Ø. Martinsen, Xiantao Shen, S. Pedersen‐Bjergaard, 2017, Analytica chimica acta.

Electromembrane extraction for pharmaceutical and biomedical analysis - Quo vadis.

S. Pedersen‐Bjergaard, Chuixiu Huang, K. F. Seip, 2015, Journal of pharmaceutical and biomedical analysis.

Selective electromembrane extraction based on isoelectric point: Fundamental studies with angiotensin II antipeptide as model analyte

S. Pedersen‐Bjergaard, Chuixiu Huang, Astrid Gjelstad, 2015 .

Electromembrane extraction—Three‐phase electrophoresis for future preparative applications

S. Pedersen‐Bjergaard, Astrid Gjelstad, 2014, Electrophoresis.

Parallel electromembrane extraction in the 96-well format.

Lars Erik Eng Eibak, S. Pedersen‐Bjergaard, K. Rasmussen, 2014, Analytica chimica acta.

Selective electromembrane extraction at low voltages based on analyte polarity and charge.

Nickolaj J. Petersen, N. Petersen, S. Hansen, 2012, Journal of chromatography. A.

Low-voltage electromembrane extraction of basic drugs from biological samples.

S. Pedersen‐Bjergaard, K. Rasmussen, Astrid Gjelstad, 2008, Journal of chromatography. A.

Electromembrane extraction: Distribution or electrophoresis?

S. Pedersen‐Bjergaard, K. F. Seip, Astrid Gjelstad, 2013, Electrophoresis.

Electromembrane extraction as a rapid and selective miniaturized sample preparation technique for biological fluids.

S. Pedersen‐Bjergaard, K. F. Seip, Astrid Gjelstad, 2015, Bioanalysis.

Stability and efficiency of supported liquid membranes in electromembrane extraction—a link to solvent properties

M. Faizi, S. Pedersen‐Bjergaard, K. F. Seip, 2014, Analytical and Bioanalytical Chemistry.

Electromembrane extraction from aqueous samples containing polar organic solvents.

S. Pedersen‐Bjergaard, K. F. Seip, Astrid Gjelstad, 2013, Journal of Chromatography A.

Oral fluid drug analysis in the age of new psychoactive substances.

Å. Øiestad, E. Øiestad, Astrid Gjelstad, 2016, Bioanalysis.

Parallel artificial liquid membrane extraction of psychoactive analytes: a novel approach in therapeutic drug monitoring.

Katharina Norgren Olsen, S. Pedersen‐Bjergaard, Astrid Gjelstad, 2018, Bioanalysis.

One-step extraction of polar drugs from plasma by parallel artificial liquid membrane extraction.

L. Nováková, S. Pedersen‐Bjergaard, V. Pilařová, 2017, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Three-phase hollow fiber liquid-phase microextraction and parallel artificial liquid membrane extraction

Astrid Gjelstad, 2019, TrAC Trends in Analytical Chemistry.

Hollow fiber-liquid-phase microextraction of fungicides from orange juices.

Stig Pedersen-Bjergaard, Knut Einar Rasmussen, Francisco Barahona, 2010, Journal of chromatography. A.

Volumetric absorptive MicroSampling vs. other blood sampling materials in LC–MS‐based protein analysis – preliminary investigations

T. G. Halvorsen, Astrid Gjelstad, Cecilie Rosting, 2018, Journal of pharmaceutical and biomedical analysis.

Liquid-phase microextraction of aromatic amines: hollow fiber–liquid-phase microextraction and parallel artificial liquid membrane extraction comparison

T. Schmidt, Wiebke Kaziur-Cegla, Astrid Gjelstad, 2023, Analytical and Bioanalytical Chemistry.

Rapid determination of designer benzodiazepines, benzodiazepines, and Z-hypnotics in whole blood using parallel artificial liquid membrane extraction and UHPLC-MS/MS

S. Pedersen‐Bjergaard, Å. Øiestad, E. Øiestad, 2018, Analytical and Bioanalytical Chemistry.

Trends in dietary supplement use among athletes selected for doping controls

Astrid Gjelstad, F. Lauritzen, Fredrik Lauritzen, 2023, Frontiers in Nutrition.

Dried Blood Spots on Carboxymethyl Cellulose Sheets: Rapid Sample Preparation Based on Dissolution and Precipitation

S. Pedersen‐Bjergaard, Astrid Gjelstad, Kristine Skoglund Ask, 2016, Chromatographia.

Selektiv væskefasemikroekstraksjon av angiotensin I, II og III i humant plasma

Astrid Gjelstad, 2004 .

Expanding the knowledge on dried blood spots and LC-MS-based protein analysis: two different sampling materials and six protein targets

T. G. Halvorsen, Astrid Gjelstad, Cecilie Rosting, 2017, Analytical and Bioanalytical Chemistry.

Kosttilskudd - Dopingfelle eller en nødvendig del av treningen?

Astrid Gjelstad, Carolina Dale, Fredrik Lauritzen, 2020, Norsk tidsskrift for ernæring.

Electromembrane extraction of stimulating drugs from undiluted whole blood.

Lars Erik Eng Eibak, A. Christophersen, S. Pedersen‐Bjergaard, 2012, Journal of chromatography. A.